I guess we wait for this to pan out as we get closer to GH5's September release. CP+B is the agency responsible for the Guitar Hero franchise. However Droga5 did the previous viral campaign Bike Hero for Guitar Hero 4. So right now unsure who is responsible. The use of the stero on the shoulder has me wondering if even the same directors were used.

Update: I have confirmation, from my sources, that this is officially for Guitar Hero 5.